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Probabilistic Constellation Shaping for Optical Fiber Communications
2019
Journal of Lightwave Technology
We review probabilistic constellation shaping (PCS), which has been a key enabler for several recent record-setting optical fiber communications experiments. PCS provides both finegrained rate adaptability and energy efficiency (sensitivity) gains. We discuss the reasons for the fundamentally better performance of PCS over other constellation shaping techniques that also achieve rate adaptability, such as time-division hybrid modulation, and examine in detail the impact of sub-optimum shaping
doi:10.1109/jlt.2019.2898855
fatcat:imvzsmxndrdvxou6uhbb3mqxmm